Blindstitch-machine.



L. ONDERDONK.

BLINDSTITOH MACHINE.

APPLIGATION FILED JAN. 14, 1908.

1,1 32,967, Patented Mar. 23, 1915.

, 2 SHEETS-SHEET 1.

Svwentoz L. ONDERDONK. 4, BLINDSTITCH MACHINE. APPLICATION FILED JAN.14, I908.

Patented Mar. 23, 1915. 2 sums-sum 2.

attomugs LANSING ONDERDONK, OF NEW YORK, Y., ASSIGNOR TO UNION SPECIAL MACHIN COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

BLINDSTI'JlCH-MAGHINE.

Specification of Letters Patent. Patnfed 111 23 1915.

Application filed January 14, 1908. Serial No. 410,774.

support and for rigidly supporting the same in-its raised position.

A further object of my invention is to provide means for positively adjusting the normal or raised position of the work support relative to the needle.

In the drawings which show by way of illustration one embodiment of my invention: Figure 1 is a front View partly in section, of a sewing machine provided with my improvements. Fig. 2 is a horizontal sectional view of the standard of the ma-. chine. Fig. 3 is a front view partly in section of the lower portion of the sewing machine, showing the work support in its lowered position. Fig. 4 is an enlarged detail end view of the modified form of means for turning the adjusting screw 57. Fig. 5 is a side view of the adjusting thumb nut and the lower end of the locking plate.

' The base 1 has rising therefrom. the usual standard 2, carrying an overhanging arm 3 at the forward end of which is the needle head 4. The needle 5 is carried by a needle lever 6 pivoted to the overhanging arm.-

Said needle lever receives its oscillation through a link 8, which is pivoted to a rock lever 9, mounted on the standard of the machine.

The rock lever 9 is operated from the main shaft which receives its movement from the belt wheel 13. Cotiperating with said needle is any suitable complementary stitch forming mechanism. The particular form of stitch forming mechanism however, forms no part of the present invention, and will not need further description.

The base plate 1 has a work supporting arm 14, extending through an opening 15 in the standard and pivoted therein by a pivot bolt 16. Within the work supporting arm 14 is located the feeding mechanism which,

in the present embodiment of my invention any other form of feeding mechanism or of crimping ridge, may be substituted for that herein shown.

- The material is held against the crimping ridge by the presser members 42 and 43,

which are pivoted to the overhanging arm,

and yieldingly held in contact with the crimping ridge by means of the springs 44, 45.

The work supporting arm is provided with the downwardly extending flange or lug 46. Said flange carries near its lower end a stud 47 having spaced ears between which is pivoted one end of the link 48. The link 48 at its op osite end is pivoted in the bifurcated end of a link 49 by means of a pivot 50.

The link 49 is rigidly secured to a shaft 51 which is -mounted in a bearing 52 and carries on its outer end a handy lever 53. The bearing 52 is mounted in a slot 54 in the standard, and is secured in place by a nut 55. The link 48 is also provided with a lip or lug 56 which contacts with the link 49 when the parts are in the position shown in Fig. 1. In this position. the pivotal con- .nection between the links 48 and 49 is locking nut is loosened and the adj ustingscrew 57 is turned. Said adjusting screw 57 is threaded at its inner end into a lug 58 carried by the bearing 52, and is pro vided at its outer end with a collar 59 which is held in a seat in the bed plate by means of a plate 60. It will be apparent therefore,

that as the adjusting screw 57 is turned in one direction, or the other, the front end of the work support will be raised or lowered.

The operation of my device is as follows: When it is desired to insert the material into the machine, the hand lever 53 is turned which operates toggle links 48, 49 and thus lowers the front end of the work support as shown in Fig.3. After the material is placed upon the work support the handle is again turned in the opposite direction, which raises the work support to the position shown in Fig. l. The pivot 5d of the toggles moves. slightly beyond a line passing through the axis of the shaft 51 and the center of the pivotal connection of the link 4-8 to the depending lug 46. The lug 56 engages the link 4:9 and holds the parts from further movement; lln this position, it will be seen, that the work support is rigidly held in its raised position. By means of the adjusting screw 57, the raised. position of the work support it relative to the needle may be varied. screw driver or other suitable instrument in the eye or": the adjusting screw 57, may by gradually turning said screw, carefully po sition the crimping ridge relative tothe needle. This positioning of the crimping ridge relative to the needle, requires a very fine adjustment, for the reason that the needle must be positioned relative to the crimpingridge,'so as to enter and emerge from the material, without passing through to the right or under side of the material. When operating upon very fine material,- the proper adjustment is often diliicult to obtain. lly my adjusting screw however, the position of the ridge relative to the needle, may be verycaretully changed and the proper position obtained.

in Figs. 4 and 5, l have shown a modified form of operating means for the adjusting screw 57. Said nut 61, which is rigidly secured to the end of the adjusting screw 57, which adjusting screw is extended beyond the casing oft-the sewing machine slightly, inorder to receive said thumb nut. Said thumb nut is pro.-

vided at its base, with a notch disk .62.

Mounted on the rear end of the machine is a sliding plate-63 which is slotted at 64 to receive guiding screws 65 tapped into the standard of the machine.

shaped notches cut in the disk 62. The purpose of said sliding plate is to lock the thumb nutand the adjusting screw inits various adjusted positions.

An arrow orv other suitable mark 87-may be made on the casing of the machine, and

- justments ot the work support.

serves as a guide forproperly adjusting the work support relative to the needle. The disk may be provided with suitable characters to indicate the predetermined ad- 'llhe sliding plate 63 is preferably held depressed, so as to lock the thumb nut by a spring 68 which is secured at one end to one of the llhe operator placing a 1 "arm,

means comprises a thumb raeaeea support, a crimpingridge mounted on work support and having a tired position relative thereto,- means tor raising and lowering the worlc support to and'iirom operat ing position relative to the needle, and ad justing means ifor positively raising and lowering the worlt support for changing the operative position of the crimping ridge relative to the path of the needle.

2. The combination with. an overhanging arm, of a needle carried thereby, a worlrsupporting arm, feeding members carried by saidworh-supporting arm, a crimping ridge carried by the work-supporting arm, means for. raising and lowering said worl supporting arm and for holding the same rigidly in raised position, and means for adjusting the position of the work-supports ing arm and the crimping ridge relative to said needle.

3. The combination of an overhanging a needle carried thereby, a work support, feeding members carried by the worlr support, a crimping ridge mounted on the work support, means for raising and lowering'the work support and for holding the same rigidly in raised position, and an adjusting screw for varying the position of the work support and crimping ridge relative to-the needle. 4. A sewing machine including in combination, a work-supporting arm, an overa hanging arm, a needle carried by said overhanging arm, a toggle lever for raising and lowering the work-supporting arm relative to the overhanging arm, and means for adjusting the position of the toggle lever.

5. A sewing machine including in combination, an overhanging arm, a standard, a

work-supporting arm pivoted to said standa ard and movable toward and from said over- The lower end 66 of the sliding plate 63, is V-shaped to correspond with the V- hanging arm, a needle carried by said overhanging. arm, a link pivoted to said worksupporting arm, a second link pivoted to said first named link and to the standard, and a lug for limiting the movement of said links for holding the work-supporting arm in raised position.

6. A sewing machine including in combination, an overhanging arm, a needle carried by said overhanging arm, a standard supporting said overhanging arm, a work-supporting member pivoted to said standard and movable toward and from the overhanging arm, a crimping ridge movable with said work-supporting member, a link pivoted to said work-supportingmember, a second linlr Mid pivoted to the first named link and to the standard, a lug for limiting the movement of said link and for holding the work-supporting arm in raised position, and means for adjusting the position of the pivotal connectlOl between the second link and the standar 7. A sewing machine including in combination, an overhanging arm, a needle carried by said overhanging arm, a standard supporting said overhanging arm, a work-supporting member pivoted to said standard and movable, toward and from the overhanging arm, a crimping ridge movable with said Work-supporting member, a link pivoted to said work-supporting member, a second link pivoted to the first named link and to the standard, a lug for limiting the movement of said link and for holding the work-supporting arm in raised position, an adjusting screw mounted in said standard and engaging the pivot bearing of the second link whereby the position of the work-supporting member may be adjusted.

8. A sewing machine including in combination, a standard, an overhanging arm carried by said standard, a needle mounted in said overhanging arm, a work-supporting arm pivoted to said standard, and movable toward and from the overhanging arm, a link pivoted to said work-supporting'arm, a shaft mounted in abearing carried by the standard, a second link pivoted to the first named link, and rigidly connected to said standard, and a hand lever connected to said shaft.

' 9. The combination of a standard, a work supporting arm pivoted to said standard, a

link pivoted to said work supporting arm, a

second link pivoted to said first named link and to a shaft mounted in a bearing carried by the standard, and a hand lever connected to said shaft, an adjusting, screw mounted in said standard and connected to the bearing carrying the shaft whereby the position of the work supporting arm may be varied.

10. The combination with a standard, of an overhanging arm carried thereby, a needle mounted on said overhanging arm, a

work supporting arm pivoted to said-stand-- ard, a crimping ridge carried by said ,work supporting arm, a toggle lever connected to said work supporting arm, a shaft connected to said toggle lever, an adjustable bearing for said shaft, a hand lever connected to said 7 said lever.

shaft and an adjusting screw for adjusting the position of said bearing.

11. A sewing machine including in combination, an overhanging arm, a needle carried thereby, and moving in a substantially horizontal plane, a pivoted work-supporting arm, a crimping ridge carried by saidworksupporting arm, means for raising and lowering said work-supporting arm and for holding the same rigidly in raised position, said raising and lowering means including toggle links attached to the work-supporting arm at a point at one side of the pivotal support thereof.

12. A sewing machine including in combination, an overhanging arm, a'needle carried thereby and'moving in a substantially horizontal plane, a movable work support, a,

crimping ridge carried by said work support, means for raising and lowering the work support and crimping member, means for positively adjusting the crimping member and work support toward and from the needle to position the crimping member rela tive to the needle, said adjusting means operating to hold the Work support in its adjusted position.

13. The combination with an overhanging arm, of a'needle carried thereby, awork support, means for raising. and lowering said work support, including a manually-oper- 'ated lever, means connecting said manually-operated lever to said work support, means for limiting the throw of sa1d lever, and nieans to bodily adjust the position of 14. The combination with an overhanging arm, a needle carried thereby, awork support, a crimping ridge carried thereby, means for raising and lowering said work support, and holding the same rigidly in raised position and an adjusting screw for varying the position of said work support, relativeto said needle, a thumb nut carried by said adjusting screw, and means for engaging said thumb nut for holding the ad'- justing screw in predetermined ad usted positions.

In testimony whereof Iaflix my signature, in presence of two wltnesses.

JOSEPH BERGER, J12, R. S. OsWALu. 

